A swarm intelligence based multi-label feature selection method hybridized with a local search strategy

نوع مقاله : علمی-پژوهشی

نویسندگان

1 Department of Computer Engineering, Islamic Azad University, Sanandaj Branch, Sanandaj, Iran

2 Department of Computer Engineering, University of Kurdistan, Sanandaj, Iran

3 Department of Computer Engineering, Islamic Azad University, Sanandaj Branch, Sanandaj, Iran.

چکیده

Multi-label classification aims at assigning more than one label to each instance. Many real-world multi-label classification tasks are high dimensional, leading to reduced performance of traditional classifiers. Feature selection is a common approach to tackle this issue by choosing prominent features. Multi-label feature selection is an NP-hard approach, and so far, some swarm intelligence-based strategies and have been proposed to find a near optimal solution within a reasonable time. In this paper, a hybrid intelligence algorithm based on the binary algorithm of particle swarm optimization and a novel local search strategy has been proposed to select a set of prominent features. To this aim, features are divided into two categories based on the extension rate and the relationship between the output and the local search strategy to increase the convergence speed. The first group features have more similarity to class and less similarity to other features, and the second is redundant and less relevant features. Accordingly, a local operator is added to the particle swarm optimization algorithm to reduce redundant features and keep relevant ones among each solution. The aim of this operator leads to enhance the convergence speed of the proposed algorithm compared to other algorithms presented in this field. Evaluation of the proposed solution and the proposed statistical test shows that the proposed approach improves different classification criteria of multi-label classification and outperforms other methods in most cases. Also in cases where achieving higher accuracy is more important than time, it is more appropriate to use this method.

کلیدواژه‌ها

عنوان مقاله [English]

A swarm intelligence based multi-label feature selection method hybridized with a local search strategy

نویسندگان [English]

  • A. Rafiee 1
  • P. Moradi 2
  • A. Ghaderzadeh 3
1 Department of Computer Engineering, Islamic Azad University, Sanandaj Branch, Sanandaj, Iran
2 2Department of Computer Engineering, University of Kurdistan, Sanandaj, Iran
3 Department of Computer Engineering, Islamic Azad University, Sanandaj Branch, Sanandaj, Iran
چکیده [English]

Multi-label classification aims at assigning more than one label to each instance. Many real-world multi-label classification tasks are high dimensional, leading to reduced performance of traditional classifiers. Feature selection is a common approach to tackle this issue by choosing prominent features. Multi-label feature selection is an NP-hard approach, and so far, some swarm intelligence-based strategies and have been proposed to find a near optimal solution within a reasonable time. In this paper, a hybrid intelligence algorithm based on the binary algorithm of particle swarm optimization and a novel local search strategy has been proposed to select a set of prominent features. To this aim, features are divided into two categories based on the extension rate and the relationship between the output and the local search strategy to increase the convergence speed. The first group features have more similarity to class and less similarity to other features, and the second is redundant and less relevant features. Accordingly, a local operator is added to the particle swarm optimization algorithm to reduce redundant features and keep relevant ones among each solution. The aim of this operator leads to enhance the convergence speed of the proposed algorithm compared to other algorithms presented in this field. Evaluation of the proposed solution and the proposed statistical test shows that the proposed approach improves different classification criteria of multi-label classification and outperforms other methods in most cases. Also in cases where achieving higher accuracy is more important than time, it is more appropriate to use this method.

کلیدواژه‌ها [English]

  • Feature selection
  • Multi-label classification
  • Local search strategy
  • Swarm intelligence
  • Particle swarm optimization

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